Unit 8 Taxonomy Review: B.8A, B.8B, B.8C

The gray squirrel, Eastern fox squirrel, and red squirrel are all different species of squirrels. Why is having a scientific name for each species of an organism important?

• To prevent existing named organisms from having their names changed as they become extinct.

• To keep the classification system from being altered as new organisms are discovered.

• To allow organisms to be placed in many classification levels at the same time.

• To standardize the naming and organization of organisms to avoid confusion,

organisms are classified today using the Linnaean system, and the following table shows the taxonomic classification of two marine organisms living along the Pacific Coast. Taxonomic classification is important to marine biologists because it provides a way to...

• prove that marine evolution occurs

• discover and name every marine organism on Earth

• designate Latin as the universal language of marine biology

• identify marine organisms and find evolutionary relationships between them.

Adult mountain lions (Puma concolor) are almost 2 meters long. They have a black spot over each eye. The common names used throughout the United States for this species are listed in the chart. Why is it best for scientists to use the name from the standardized taxonomic system?

• The standardized name differentiates mountain ions and pumas.

• The standardized name is less descriptive of the animal that has been observed.

• Communication with other scientists about mountain lions will be reduced.

• All scientists will be using one name for mountain lions.

The Linnaean taxonomic system classifies organisms into divisions called taxa. If two organisms belong to the same taxonomic group, they are related. Similarity at which of these levels indicates the closest relationship?

• Kingdom

• Class

• Order

• Genus

A dichotomous key for identifying fish is shown. Based on this key, which two fish have eyes located on either side of their head and are not spotted?

• Glassy sweeper and squirrelfish

• Glasseye snapper and spotted eagle ray

• Spotted goatfish and bandtail puffer

• Peacock flounder and glassy sweeper

Many tree frog populations are threatened due to habitat loss. In an effort to promote conservation, tree frogs may be bred in captivity. A zoo acquired male and female tree frogs from two different populations. In the zoo, the tree frogs were able to successfully mate within their won population, but breeding attempts between the two populations were unsuccessful. Based on this information, which statement correctly describes the relationship between the two populations of tree frogs?

• They are in the same species but different kingdoms.

• They are in the same class but different phyla.

• They are in the same family but different orders.

• They are in the same genus but different species.

A student used a microscope to study four members of the phylum Ciliophora. Members of this phylum move when propelled by hundreds of tiny cilia. Although these organisms belong to the same phylum, they are classified as different...

• families

• species

• kingdoms

• orders

Simple leaves have a single leaf on a petiole, or stem, while compound leaves have more than one leaflet on a petiole. this unknown leaf can be identified using the dichotomous key. Which tree does the unknown leaf come from?

• Ungnadia speciosa

• Sophora secundiflora

• Salix nigra

• Quercus laceyi

The classifications of four trees are shown in the table. Which two trees are the most closely related?

• Taiwan beech and Taiwan catkin yew

• Taiwan catkin yew and Lodgepole pine

• Lodgepole pine and Japanese maple

• Japanese maple and Taiwan beech

This dichotomous key can be used to identify some conifers. Based on the key, which of these best describes the leaves and cones of the longleaf pine?

• Needle-like straight leaves that are mostly over 25 cm long and found in clusters of three; no thorns on cones

• Flattened and scale-like leaves that are mostly over 25 cm long; soft and leathery cones

• Needle-like straight leaves with a length of 25 cm that are mostly found in clusters of five; thorny cones

• Leaves with a length of 25 cm that are found in clusters of more than five; no thorns on cones